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KMID : 0362720040420110790
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Journal of the Korean Dental Association
2004 Volume.42 No. 11 p.790 ~ p.797
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Leem Soo-Hwan
Lee Ju-Hee
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Abstract
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Purpose : The objective of this study was to compare enamel bond strengths between self-etching adhesives and acid-etching adhesives and to investigate the effects of priming time and phosphoric acid etching prior to applications of self-etching adhesives.
Materials and Methods : The materials for self-etching adhesives were used XenoⅢ and iBond, for acid-etching adhesives was used Single Bond. Recently extracted molars were condensed into resin block and then exposed buccal surface, and specimens were divided into seven groups and tested. 35% phosphoric acid was used for enamel etching, and Z250 was used for filling. The data for each groups were anayzed using the Tukey multiple comparisons test at p=0.05.
Results : 1. Shear bond strength to enamel of acid-etching adhesives was higher than those of self-etching adhesives. No significant difference was founded between the groups of self-etching adhesives(P>0.05).
2. When the priming time of self-etching adhesives was doubled, shear bond strength to enamel of XenoⅢ with higher acidity increased 53%, but no significant difference was founded in that of iBond(P>0.05).
3. When phosphoric acid etching was done prior to application of self-etching adhesives, each shear bond strengths to enamel of XenoⅢ and iBond increased 95% and 55%, and XenoⅢ showed no significant difference in case of comparing that of acid-etching adhesives(P>0.05).
4. Fracture modes to enamel of self-etching adhesives showed adhesive fracture, and in groups of acid-etching adhesives, phosphoric acid etching groups, longer priming time group of XenoⅢ showed cohesive fracture.
5. Higher shear bond strength groups showed cohesive fracture, and lower shear bond strength groups showed adhesive fracture.
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KEYWORD
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Acid-etching, Self-etching adhesives, Shear bond strength
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